code: def __call__(self, obj):
      if isinstance(obj, DATAFRAME_TYPE):
          return self.new_dataframe(
              [obj],
              shape=obj.shape,
              dtypes=obj.dtypes,
              index_value=obj.index_value,
              columns_value=obj.columns_value,
          )
      else:
          assert isinstance(obj, SERIES_TYPE)
          return self.new_series(
              [obj],
              shape=obj.shape,
              dtype=obj.dtype,
              index_value=obj.index_value,
              name=obj.name,
          )
  
file_path: mars/mars/dataframe/base/core.py
imports: from ...serialization.serializables import KeyField
  from ..operands import DataFrameOperand, DataFrameOperandMixin
  from ..core import DATAFRAME_TYPE, SERIES_TYPE
label_desc: Use image node_id 3 for calling the DataFrameDeviceConversionBase obj's underlying member method code with example usage: obj.__call__(obj) and returns: self, self